The Reinforcement Effect of Two Extra Carbon Fiber Layers on the Flexural Rigidity and Young Modulus for Sandwich Bars with Honeycomb Core

Abstract:

In this paper we will build some new and original composite sandwich bars reinforced with two and four layers of carbon fiber (in the upper and lower sides), with the core made of polypropylene honeycomb. For these sandwich bars, we will use the next experimental setup: we will clamp them at one end and we will leave the other free. Using an accelerometer, we will record the eigenfrequencies. Bu using the eigenfrequencies values and the Euler-Bernoulli theory, there is established a procedure to determine the bars flexural rigidity and dynamic Young modulus. We will consider the bars as having 320 and 350 mm free lengths. We will highlight how the two extra carbon fiber layers will influence the flexural rigidity values and the dynamic Young modulus.

• Periodical: Applied Mechanics and Materials (Volume 823)
• Pages: 501-506
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.823.501
• Online since: January 2016
• Authors: Cosmin Mihai Miriţoiu*, Cristian Oliviu Burada, Daniela Florentina Tărâţă, Alexandru Bolcu, Claudia Alina Miriţoiu
• Keywords: Carbon Fiber, Flexural Rigidity, Polypropylene Honeycomb, Young Modulus

References

[1] P.N. Patankar, V. Gopinathan, P. Ramakrishnan, Studies on carbon fiber reinforced aluminum composite processed using pre-treated carbon fibers, Journal of Materials Science, 26 (1991), 4196-4202.

DOI: 10.1007/bf02402968

[2] V.Y. Varshavskii, Fibre composite materials. Realization of the properties of carbon fibers in composite materials. Part 2. Carbon fibre composites with a metal matrix (review), Fibre Chemistry, 27(1995), 176-183.

DOI: 10.1007/bf00554579

[3] V.Y. Varshavskii, Y.G. Korabel'nikov, Fibre composite materials. Realization of the properties of carbon fibers in composite materials. Part 1. Realization of the elastic-strength properties of carbon fibers in unidirectional carbon filled plastics (review), Fibre Chemistry, 27(1995).

DOI: 10.1007/bf00557669

[4] G.M. Gunyaev, L.P. Kobets, G.G. Zaitsev, Mean values of the mechanical properties of carbon fibers from test results on carbon-fiber-reinforced plastics, Problemy Prochnosti, 8 (1976), 36-40.

DOI: 10.1007/bf01529798

[5] Y. Zhou, Y. Wang, S. Jeelani, Y. Xia, Experimental Study on Tensile Behavior of Carbon Fiber and Carbon Fiber Reinforced Aluminum at Different Strain Rate, Appl Compos Mater, 14 (2007), 17-31.

DOI: 10.1007/s10443-006-9028-5

[6] H. Rong, K-H Dahmen, H. Garmestani, M. Yu, K. I. Jacob, Comparison of chemical vapor deposition and chemical grafting for improving the mechanical properties of carbon fiber/epoxy composites with multi-wall carbon nanotubes, J Mater Sci, 48 (2013).

DOI: 10.1007/s10853-012-7119-2

[7] S.H. Li, C.G. Chao, Effects of carbon fiber/ Al interface on mechanical properties on carbon-fiber-reinforced aluminum-matrix composites, Metalurgical and Materials Transactions A, 35A(2004), 2153-2160.

DOI: 10.1007/s11661-004-0163-z

[8] J. Li, Y.C. Xia, The reinforcement effect of carbon fiber on the friction and wear properties of carbon fiber reinforced PA6 composites, Fibers and Polymers, 10 (2009), 519-525.

DOI: 10.1007/s12221-009-0519-5

[9] W. Nowacki, Dynamics of elastic systems, Technical Publishing House, Bucharest, (1969).

[10] D., Băgnaru, S. Rizescu, D. Bolcu, Vibrations of elastic systems, Didactic and pedagogical Publishing House, Bucharest, (1997).

[11] ASTM E756, Standard test method for measuring vibration damping properties of materials, (1998).

[12] S.S. JUNG, Y.T. KIM, Y.B. LEE, S.H. SHIN, D. KIM, H.C. KIM, Measurement of the resonance frequency, the loss factor and the dynamic Young's modulus in structural steel and polycarbonate by using an acoustic velocity sensor, Journal of the Korean Physical Society, 49 (2006).